Dyfyniad APA
Powell, J. (1875). Exploration of the Colorado River of the West and Its Tributaries: Explored in 1869, 1870, 1871, and 1872. Government Pr. Office.
Dyfyniad Arddull Chicago
Powell, J.W. Exploration of the Colorado River of the West and Its Tributaries: Explored in 1869, 1870, 1871, and 1872. Washington: Government Pr. Office, 1875.
Dyfyniad MLA
Powell, J.W. Exploration of the Colorado River of the West and Its Tributaries: Explored in 1869, 1870, 1871, and 1872. Government Pr. Office, 1875.
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